Seasonal trends, chemical speciation and source apportionment of fine PM in Tehran

Arhami, Mohammad; Hosseini, Vahid; Shahne, Maryam Zare; Bigdeli, M.; Lai, Alexandra; Schauer, James J.

doi:10.1016/j.atmosenv.2016.12.046

Cited by 105 publications

(44 citation statements)

References 73 publications

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“…Figure also shows a lack of correlation between the mean annual values of ASR S and CC measured at the station Tehran, but a strong positive correlation (non‐significant) between ASR S and CSR S . This fact may be explained by the increase in the amount of aerosol in Tehran (Sabetghadam et al, ; Crosbie et al, ; Arhami et al, ), which can notably affect the transparency of the atmosphere and therefor the amount of ASR S received at this station (Sanchez‐Lorenzo et al, ; Wild, ; Zhao et al, ; Sanchez‐Romero et al, ; Rahimzadeh et al, ; Qian, ). Furthermore, it is worth to mention that aerosols in Tehran seem to largely origin from anthropogenic air pollution (Crosbie et al, ; Sabetghadam and Ahmadi‐Givi, ).…”

Section: Discussionmentioning

confidence: 99%

Dimming in Iran since the 2000s and the potential underlying causes

Jahani

Dinpashoh

Wild

2017

Intl Journal of Climatology

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Section: Discussionmentioning

confidence: 99%

Dimming in Iran since the 2000s and the potential underlying causes

Jahani

Dinpashoh

Wild

2017

Intl Journal of Climatology

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“…Figure 2 shows an overview of coarse PM concentration and its seasonal variability at the two sampling locations. As can be seen in the graph, a higher concentration of coarse PM is observed during the warm season, as opposed to the cold season, due to the increase in particle concentration originating from dust and crustal elements in hot and dry days [47,48,71,72]. Figure 3 also illustrates the seasonal variations in the concentrations of selected metals at both of the sampling sites.…”

Section: Data Overviewmentioning

confidence: 88%

“…Previous source apportionment studies have identified vehicular emissions, secondary aerosol, and industrial emissions as the dominant sources of PM 2.5 in Tehran with minimum contributions from road dust, biomass burning, soil, oil combustion, and sea salt to PM 2.5 mass [46][47][48]. Furthermore, residential oil combustion, gasoline, and diesel-powered vehicles had moderate to high correlations with the PM 2.5 associated oxidative potential in Tehran, measured by means of the Dichlorofluorescin (DCFH) in vitro assay [49].…”

Section: Introductionmentioning

confidence: 99%

Sources and Temporal Variations of Coarse Particulate Matter (PM) in Central Tehran, Iran

et al. 2019

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In this study, we used the positive matrix factorization (PMF) model to evaluate the sources of ambient coarse particulate matter (PM) and their temporal variations in two sampling sites, i.e., a school dormitory and a retirement home, located in central Tehran. 24-h ambient PM samples were collected using low-volume air samplers from May 2012 to June 2013. The collected filters were analyzed for their chemical components, including water-soluble ions, metals, and trace elements, which were used as the input to the PMF model. Our results indicated annual averages of 45.7 ± 3.8 µg/m 3 and 36.2. ± 4.0 µg/m 3 for coarse PM at the School dormitory and Tohid retirement home, respectively. Moreover, higher ambient coarse PM mass concentrations were observed in the warm season (53.3 ± 5.8 µg/m 3 for school dormitory and 43.1 ± 6.1 µg/m 3 for Tohid retirement home) as opposed to the cold season (41.4 ± 4.7 µg/m 3 for school dormitory and 28.7 ± 4.6 µg/m 3 for Tohid retirement home). Our PMF analysis also identified road dust, soil, and industry, and atmospherically processed coarse PM as the three sources of ambient coarse PM in central Tehran. Road dust, soil, and industry were the major sources of ambient coarse PM, contributing respectively to 74 ± 9% and 19 ± 2% of the total coarse PM mass concentration, while atmospherically aged aerosols had a rather minimal contribution of 7 ± 1% to total coarse PM mass concentration. The temporal trends of the resolved factors also revealed higher contributions of road dust to total ambient coarse PM during warm season as opposed to cold season, due to the increased resuspension rate from road surfaces as a result of higher wind speeds, and temperatures, combined with lower relative humidity. Similarly, higher resuspension rate of mechanically originated particulates resulted in higher warm-season time contributions of the soil factor. Results of this study clearly revealed the key role of road dust and non-tail pipe emissions on ambient coarse PM mass concentrations in crowded areas of central Tehran, and have important implications on the potential health impacts that can be caused by these difficult to mitigate sources of coarse PM.

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“…Conducting source apportionment studies, analyzing particles by receptor models, using methods such as Positive Matric Factorization, which requires in depth modeling and a wealth of filter sample data, would deliver good insights into not only the share of each sector to the emissions, but also to ambient concentration levels. Arhami et al (2017) provide the chemical speciation distinguishing between the contribution of several major mass constituents to PM 2.5 in Central Tehran. However, it is not straight forward to translate these constituents to the above mentioned sources (mobile, energy, industries, etc.).…”

Section: Mobile Sources Are the Largest Contributor To Ambient Pm Airmentioning

confidence: 99%

Air Pollution in Tehran

Heger¹,

Sarraf²

2018

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This volume is a product of the staff of the World Bank Group. The findings, interpretations, and conclusions expressed in this volume do not necessarily reflect the views of the Executive Directors of World Bank Group or the governments they represent. The World Bank Group does not guarantee the accuracy of the data included in this work. The boundaries, colors, denominations, and other information shown on any map in this work do not imply any judgment on the part of World Bank Group concerning the legal status of any territory or the endorsement or acceptance of such boundaries. Rights and Permissions The material in this publication is copyrighted. Copying and/or transmitting portions or all of this work without permission may be a violation of applicable law. World Bank Group encourages dissemination of its work and will normally grant permission to reproduce portions of the work promptly.

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Seasonal trends, chemical speciation and source apportionment of fine PM in Tehran

Cited by 105 publications

References 73 publications

Dimming in Iran since the 2000s and the potential underlying causes

Dimming in Iran since the 2000s and the potential underlying causes

Sources and Temporal Variations of Coarse Particulate Matter (PM) in Central Tehran, Iran

Air Pollution in Tehran

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